Why is synchronization (guaranteed message delivery) necessary?

Synchronous messaging in the context of delivery guarantees means that the sender receives confirmation that the message was successfully delivered and processed by the recipient. This is important for ensuring reliability and data integrity, especially in distributed systems.

Why delivery guarantees are needed:

• Prevention of data loss: without guarantees, messages can be lost due to network failures or errors.
• Consistency of state: systems exchanging messages should have a shared understanding of the state.
• Debugging and monitoring: acknowledgments help track that messages have arrived and been processed.

In QA, this is important for testing systems where it is critical that messages are not lost and are processed in the correct order.